{
  "manageEntity": {
    "action": "Save",
    "entityId": "761631460",
    "entityType": "Track",
    "nonce": "0xc4749baa6de93d4302429fb5a39cc5f1e0a7b377890938805eec49dc0834fe76",
    "signature": "0xb4e50389cdf6ec5b9880d9951f0fc99ac3757478efd20218dc1467e8606358305c888ea8dc2aadb749fde90443f1502790d35ac31ff00f0ac8103e195e27a0c01c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}