{
  "manageEntity": {
    "action": "Save",
    "entityId": "1769134317",
    "entityType": "Track",
    "nonce": "0x92878184e865e672aa5ae2abd6a9e0bf9c3727825722a5262432706ca916f4a0",
    "signature": "0xc67a1fd6a6b1b9251bedd9e9142f559bf2616cf7a060ab6f525d6f5952cf775a2bf0467148552ad5832c1b27b508c78b32e5ed3c2e08cc3c229fe4701c3e80e81c",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}