{
  "manageEntity": {
    "action": "Save",
    "entityId": "484386",
    "entityType": "Track",
    "nonce": "0x64269f8c72526436263cdb928b1b6a5780f1955815f7b8c0cd03561c68530f8a",
    "signature": "0xc428710c03e6dd0b64d461a245cd1443ca6ee765de37c62dcfeb0fc11fba844a3e2870ced32d7f221b9b369154ac75b0b02c7cf0c16997b63160fbaf2bfe1ff41b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}