{
  "manageEntity": {
    "action": "Save",
    "entityId": "631033266",
    "entityType": "Track",
    "nonce": "0xaa6030f3588c76f555f2dcc388e5f4005aef77e449d6b887ab8cd3edf0f7bdd3",
    "signature": "0x8055856e889112b27e32e119783765e06f5ee79acbb38a85fcdbb032b9dd25986fd4078e596166cce75ed02f36039891005adfc452c4e70e53a6ce0d297577651b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}