{
  "manageEntity": {
    "action": "Save",
    "entityId": "1256992131",
    "entityType": "Track",
    "nonce": "0x8228d06db4643dc66d834f4bcf39df3fbf9567b534687f75734c5ee851e6a3ea",
    "signature": "0x0b06b4faf031415852c0d365f90713947007e97c18d9dd81d8b1fd0827af3cbe6889f1d1b0e9984480ce0fb1ef46e562a9b7d8a4598cff785442e13685ecb7581c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}