{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401406416",
    "entityType": "Track",
    "nonce": "0x59632e2bf55aaa5ba8003ae1f627cc9eaa6e7d8385a4f94070fb7afc8160907f",
    "signature": "0x6cfab605ede7671a199dd99abddfa9d45481c7a9bdd413e69c9fbb604a0371a24abf4045b83781b999135dbd05254c3bf85c961f37944adf5b04f4034f344d471c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}