{
  "manageEntity": {
    "action": "Save",
    "entityId": "108760",
    "entityType": "Track",
    "nonce": "0xe8eff6f0a34e75da1127f02e30f6e66356cbd2531fab999af9afa700c13cfe63",
    "signature": "0xa149c9e2610b04293d0158c1fa0d1200b54990b4b4f07bb71933667c08ca615f77a78e024cb444527b2dc44fdbc112162eec12def063155a0881f2d7ce3116511c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}