{
  "manageEntity": {
    "action": "Save",
    "entityId": "1787414330",
    "entityType": "Track",
    "nonce": "0x1fe8a5d7a194d7a89ce87b07e97698f6ebcdbd7042ab6af5f5b99758d29b5ab7",
    "signature": "0xd3aef1c45cc9c99630509926b459bf7b3ea53105ef9034943ecd42c078cb85e87e30f9372ad7af0780b28ab73ad177e60612f617dc09cec2d250359de0cdb0ad1b",
    "signer": "0x3bF15aA1EB9489FF9dc28205953e403A5770314d",
    "userId": "795091323"
  }
}