{
  "manageEntity": {
    "action": "Save",
    "entityId": "265635605",
    "entityType": "Track",
    "nonce": "0x1fc21208bb1dfaffbd799fb9197ca795c77f2899791d0974eaedd33121d5cb35",
    "signature": "0x0ed9bdb833f8f2e291b82b8d27f86360af52c63563ab51ec3b7c6093542f1e234a039efa462466da6cadf599f4fdd9f27dff62d6037e1b6610d14141d8b562b31c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}