{
  "manageEntity": {
    "action": "Save",
    "entityId": "1622203047",
    "entityType": "Track",
    "nonce": "0xf0783964684fa647da902a68257699207143d88fb9fcae54587cd3d1c52398ea",
    "signature": "0xfa1de6d2f364d0b2de574a5b85aeb2f0a06374936790a37355f58f0bab7f7f1309d0dbbb3878a4cbc2a58aa6bd4efcfddcf3a4214f2ba9281cc057c28b896e341c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}