{
  "manageEntity": {
    "action": "Save",
    "entityId": "385627",
    "entityType": "Track",
    "nonce": "0x086ba1a7f37d0d524178fb4c1be2b982f6f9baa84a8e36b377e9b9df9d0801d5",
    "signature": "0x4a6bace9e134368d215eacfee69c0d0b667d75b36a28f800a48957229c5ed98a3ed16858a52fbcbf910e582447c6eab800302231719a9e047b89b35915fd7a2e1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}