{
  "manageEntity": {
    "action": "Save",
    "entityId": "1402532201",
    "entityType": "Track",
    "nonce": "0x4fa5dc8eb525794e5459dc911704ce8be7b1d77047a745fc7d7ff321be7937fd",
    "signature": "0x38341d6a285b3a96f4b62d2d1f2d901306715843ff96a8a936bb26c020e2c18835ef5eea0206ccaaf103b36aacf4221e87aafe889bee4e03adb525cc53d4fd841c",
    "signer": "0x01eB7915E4941D64a8ddf370bE06647ad5F79d4e",
    "userId": "911613164"
  }
}