{
  "manageEntity": {
    "action": "Save",
    "entityId": "199262917",
    "entityType": "Track",
    "nonce": "0xc270991b67d9fcf2efb01dafc1b4e551d54af9d1888e69819a1dfcfc6b94c15c",
    "signature": "0xdb5414c5567148238b3f84439fff668afb208cb64e0c4ca02df20db1c3aeddd0682ec0bba8f2aab9bad763c42aef92a25ea62a39f53140d2571cb1b947970f251c",
    "signer": "0x582eeeC5CC8334300Ba316cdC3cCf85e3e5dFf42",
    "userId": "208819524"
  }
}