{
  "manageEntity": {
    "action": "Save",
    "entityId": "1279997044",
    "entityType": "Track",
    "nonce": "0xfc6c9fe2c49f4ea083cce0b7c60a84849e3a924bde0beffbe7132bb83869722f",
    "signature": "0xcba09d61771edf2dec0116e91fba3df71e32d7c98315aeaa16545be0c481fe492510c84d76292a5c1def936538c6b36f335d89875ffe2f7279a4f762626683c81b",
    "signer": "0x5aaD03EeeA903717f9a4E922505de7C75223d53F",
    "userId": "143226702"
  }
}