{
  "manageEntity": {
    "action": "Save",
    "entityId": "1981321705",
    "entityType": "Track",
    "nonce": "0x152fb110cdded4abef7713f250bd89068350fee751305f706528d856d1a18269",
    "signature": "0xcd1ff897e99b36b99cf64fcc67bcb0475c4cbd5e94d0eab9c35be3788da51bef127e73c9b0e6c31f93fb21acf1ba2a40621c9f9b86a025263dc11a463dfa1e831c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}