{
  "manageEntity": {
    "action": "Save",
    "entityId": "586240837",
    "entityType": "Track",
    "nonce": "0xd5214f9bbf2558b00699dd46875e464a9511062976b214171323525f4f5cbc3d",
    "signature": "0x083ba84a6de99024e987d5bf156e5310586f605638d71f8029621d43ff90196378aa85843b3cfb33be02241efa0306fd3974d8844841acbfe7425fc6d922f8fe1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}