{
  "manageEntity": {
    "action": "Save",
    "entityId": "586240837",
    "entityType": "Track",
    "nonce": "0x23c254bc50b60f61c0e8db357310d14c12da6fcc6e65220a3ebb2675acf81ab7",
    "signature": "0x44f6bc0a644eb2b2f8b6a217af4184b40dfd06483e36a7ba6ef9a91f6c563cb924d73f8f0a3fcbd9015ac4692484dbe741df6ba4d47e37ce5876c15ecfe4e95e1c",
    "signer": "0x03e9Caf2aeac5a0F0e4Be56410d67A4148D38Fd4",
    "userId": "47828528"
  }
}