{
  "manageEntity": {
    "action": "Save",
    "entityId": "1487507625",
    "entityType": "Track",
    "nonce": "0xff977d7915f41be252a276029406581e0d2b6399bebf75ffe62390a52b584e9e",
    "signature": "0x5ba266504ed426bde79acd812105cc0286a506d9de5f25db37380e0a3f2c251e48eec5f2869d5d06643b46805d23d91929bda37907206f3e7ba8fe321fae05771c",
    "signer": "0x1642AB480EAD0cea9776277347Cbd3e5Fe9889f6",
    "userId": "711757920"
  }
}