{
  "manageEntity": {
    "action": "Save",
    "entityId": "1218278042",
    "entityType": "Track",
    "nonce": "0xcf8bbb057230cc0bf2a1fbd19a1c3720fbb556c0215b000625ff74ad57ad760f",
    "signature": "0xaa5ce37c03cd5237f440e770b363ed035addf4d2eb049889dc63023b645c9c5866452dc7a5780291e91382f2223ea858a8c912d1279a7515c002b7c1104c66a61b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}