{
  "manageEntity": {
    "action": "Save",
    "entityId": "586397",
    "entityType": "Track",
    "nonce": "0xb11956679d66e3977a5b0a4b4767c3815b285147a0fca7c8d1b6bb11a7e28d1b",
    "signature": "0x7b7d4066df58a771ee18c5f2db99f1dd7f21c8bcf29e6fa0980a2bce417ab965202ff0b79676637b39c4ffa30556286a4f761897591d94e319b247c3b4cd168e1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}