{
  "manageEntity": {
    "action": "Save",
    "entityId": "1953154181",
    "entityType": "Track",
    "nonce": "0xd9a73eb50fed5f4fff7f720393e3989853f7f266d5b455ef2f29433fb601fde8",
    "signature": "0x92c105af1b43e78a3972530a96b01faacd6f35fb40030a3b980ebf24b1ec21cc1a1eea0c9393f81a2dbeacc26d277eaed99d6036f8a0e4f0a57ac79104f097471c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}