{
  "manageEntity": {
    "action": "Save",
    "entityId": "1016660212",
    "entityType": "Track",
    "nonce": "0x1299a7344b904cf61fd0bab8b4d5ae776aebc1bc979366b66837a4e022e4a420",
    "signature": "0x2e5ef14939ad0dd801408bd85e54ebb9e380c47c127cb6c96ffa7d9724a5b7b270bcb3ae95e3b74ae87860f247cdd7893f1b498816bc801b1c20533f27e00a351c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}