{
  "manageEntity": {
    "action": "Save",
    "entityId": "116599291",
    "entityType": "Track",
    "nonce": "0x71f993ef00d01a3af97db981e07918a49d559e2e26e55779b7ef7ee4bf32280c",
    "signature": "0x81e1a098cc58304356e5993bd83078b3dceb0d3cfa98fa0408587a30c2cc2fc630ec0c8c35ada271b19b1c5cdcaf93fcf61919fd03fa51f914676a2c74bd00a01c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}