{
  "manageEntity": {
    "action": "Save",
    "entityId": "116220880",
    "entityType": "Track",
    "nonce": "0xa56417f66116bbf100069a3d645cf9d8a854c905bcc6ba7de23b11f0a44d2325",
    "signature": "0x715136f7a922838302bfd8cdb756248f745da351ebe253a259800ad23b4591225c23a1d7adfc19fc8d7dc70a37362810e26f77a897455e902da237fcf872ca031c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}