{
  "manageEntity": {
    "action": "Save",
    "entityId": "2020708472",
    "entityType": "Track",
    "nonce": "0x8913a1fde3e4ffa23f9ccb99f0fa3f150c602bea2aa9753341a391ee5874334e",
    "signature": "0x8866d73ad525f87e2192a34d9f1f8e8796cb7d1a2eb6c79217deb6e07e04699d590b3570efee87548ae5f11c9a018637be244611a9c5b955297a68da1b7ca7811c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}