{
  "manageEntity": {
    "action": "Save",
    "entityId": "206894672",
    "entityType": "Track",
    "nonce": "0xe895c4088797dea1c945f8244284572e6df79f6c037a0ef3daa4d69305d8f10b",
    "signature": "0x2c1a818372cf7994f4addc1be72f53e60fda27e9b76de0545e4694ab90ea5922607deda21cc5e6855500e2c4fa2347d35f4fcb82c64db9ec4e037405927283111b",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}