{
  "manageEntity": {
    "action": "Save",
    "entityId": "460052545",
    "entityType": "Track",
    "nonce": "0xa9a88bd07c86429431d0465ad9de90382dce1295885a3c6e95653228c94363be",
    "signature": "0x2cb846664aef82a429bc11874686b88ac6ec38d1dc79a8e824ddaac7a5b994a13331f99c37998dd28953131abc615d2728c74750d15524b0597eaa4035b1588e1c",
    "signer": "0x79491f0dfbdF0b388e8441b4c0221bfaB43075d6",
    "userId": "963945097"
  }
}