{
  "manageEntity": {
    "action": "Save",
    "entityId": "610960",
    "entityType": "Track",
    "nonce": "0x133c9591a86eba7822ae680e0af0bab612fe8e66368b0df34ac398c2c3cd59ba",
    "signature": "0x94e8ad674438b6058df707511e68d750e7de4190dcf409c505b2145476cd0d46774465b8e4667621b8b3b2e5e3ad6c214df05c68c5b0df74ea6f556d6f6114b11c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}