{
  "manageEntity": {
    "action": "Save",
    "entityId": "794228575",
    "entityType": "Track",
    "nonce": "0x0736fb43a34dc1471b2a080c082e56fe716fbfb31df2c1995b76a08b65a2d743",
    "signature": "0x856660ebf93b9dfa797e0ca76b2f0cbdbd261092c8ecf43f4c78709dca63bcdd69c6016de413118ad1d3350afda5e390caff375a0d300ad4841248245ed088d71c",
    "signer": "0x14040F946932738b04E0C04eB1CaaCb6DdC6eb2E",
    "userId": "398259"
  }
}