{
  "manageEntity": {
    "action": "Save",
    "entityId": "2034748214",
    "entityType": "Track",
    "nonce": "0xf9a0bd4dfa296aeb403b767a6ee711443d5f5d630587bfb89f3dd6c638a70c73",
    "signature": "0x50f8b20c25f75709666f5b24cef362649dbf326ae623195bf90af96e7e6f8a774f4ac3497e3571a912c2eecf5a5a843efddc01dbe325e224b8c29d1770ae5f7b1b",
    "signer": "0x35850DF551c177ABdaD2ec8C17923C6A5Ec2f7A6",
    "userId": "554253247"
  }
}