{
  "manageEntity": {
    "action": "Save",
    "entityId": "1295075810",
    "entityType": "Track",
    "nonce": "0x33aa9a7ed1760b6b468382a3093f73d7548cfd02e39163da4ea197fa790ac996",
    "signature": "0xded7212de3c9a422d758d8d237bb45f0daabe0e79c56688174e1027f8627f0e61681b408bb1fedb4e254a3f7378048228a811c19b83bb968c9202f06045df0991b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}