{
  "manageEntity": {
    "action": "Save",
    "entityId": "938781323",
    "entityType": "Track",
    "nonce": "0x35f8f11916b5715e0bf3697134ac77e38b1ab715a22c976c20cf9496a85b9f67",
    "signature": "0x1d2ef3f414427e75a832f582b1185f365e67a48b395dfbb26f0309d5cf678a375337d21a0b779466da0b3b98e8d6a4e73a76d22e9bea51dd1e40f9c954cf48391c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}