{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120469883",
    "entityType": "Track",
    "nonce": "0x4cab9b813f3503cc25bde17a8ab0db7c732c069a9635e2b47f41e0c862b78b6f",
    "signature": "0x7997c26726d26d911fe38ec9872a77afb6415600ce12b7a08f5aeada22772e16298e49774e526dc7ca45bccbc30a6371d742484378165de4e3641c0be0b77eea1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}