{
  "manageEntity": {
    "action": "Save",
    "entityId": "381102661",
    "entityType": "Track",
    "nonce": "0xfde88d3f7c30c03b130f16d4b9c504e2cf82cd041091e58a6ab03afbfc5bba43",
    "signature": "0x6320a18618d3ac5e326ddf194f92d36a99b55912f1bad5e177d6ce074ce470636a46977939a362c99c9e8021512e74885a07f3bc7fd3bc3c9d9d431d67d5d0fa1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}