{
  "manageEntity": {
    "action": "Save",
    "entityId": "2143994414",
    "entityType": "Track",
    "nonce": "0x271c7bc88f2fd3f26247802955734d72d19e38073d9c62f01ccaa40bbeb5ed40",
    "signature": "0x94d1bc0d4449e0ef35357bff0b1676b3b755bc8b57afe07261d73622371f38d859187a66f094d67323042418652454df5369e6be8f91cfc522575b4d613cc3671c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}