{
  "manageEntity": {
    "action": "Save",
    "entityId": "907187",
    "entityType": "Track",
    "nonce": "0x9e97e7be26834fa44e3263970a143d40822ca2a7619dcb72c2fe228a23945f36",
    "signature": "0x3f1ba30a01cfd7830d5d2a8c49d541e453e8aac550fcd16b33e33e733638b4cb16a01ea86e0dc47872de680c01f32af0178dc98cc699b00a9415d5497fac10111c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}