{
  "manageEntity": {
    "action": "Save",
    "entityId": "184869378",
    "entityType": "Track",
    "nonce": "0x6e7ddfc9f5f4a29614e61db5b52c4e26662b81617184b48983b5fd735d793b8e",
    "signature": "0x7a74e757689f0d58ca9180d4a0e632aa41f1939a6e838a3aed50c44e09b3bcdd412221e5ad24b84b72f864ac4682d11f889ba08df255926fae497ccae9555af31b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}