{
  "manageEntity": {
    "action": "Save",
    "entityId": "350158530",
    "entityType": "Track",
    "nonce": "0xcd95eced1954dd954ce252de6fd9a2434b7742d34dc0a762b1bda10dec349d47",
    "signature": "0xe62af25afcedf93a287489195934954184f7bb7991b1e9d01401a388031295481efeb11ca133c414c20bfacd8e0a950546b8519e7b4cf48bd9a62222327f38101c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}