{
  "manageEntity": {
    "action": "Save",
    "entityId": "654187281",
    "entityType": "Track",
    "nonce": "0xefe0b7f4b82473d2e572f8c6d0c19a74308924209358f958faeaf567611dee03",
    "signature": "0x23fbcbbb1aeeb2d9de7c987d85a55f451dda923dd84b9ff64610ac1e2a6d58f30c1163d723c255487c3a2775f480ba5c80568ef85e6df1e09648ff8915f90c211c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}