{
  "manageEntity": {
    "action": "Save",
    "entityId": "1931696435",
    "entityType": "Track",
    "nonce": "0x26bcb82f19aa3e9d6da84b0aef9666381a498c2167f57e35e82af688419af1da",
    "signature": "0x0f9fc4964a22bb37c30748a3b8c66f9c274ded44825d6385a362b4352800f39c71c4bc7513f95ef6f876e52c413420514d7ba12b45b447a61158f46a26550a9b1c",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}