{
  "manageEntity": {
    "action": "Save",
    "entityId": "1772404997",
    "entityType": "Track",
    "nonce": "0x5b5cb522847b8211af76ea1e77a017f134b5a5dbf29365ab5ad4e40b3ff5f5b7",
    "signature": "0x4b35c5668834a5a42c4ced509a019249522848091ff91c10f7fc6363703292fd5fdcbbf10bc0dbb2ac5b3bed0f7278bde80efc593d7909159ed835b556375cae1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}