{
  "manageEntity": {
    "action": "Save",
    "entityId": "245643000",
    "entityType": "Track",
    "nonce": "0x9d0110360a53b4db7eaa4b8087450e7e3b989056197fc9c5a7f2126ef0191ab4",
    "signature": "0x91d295f7603b3cff3d342ad2f3f5f54888ee2c446e8f82095f0553bb08eaff222efc4dafd9d1cbd0558afccbf0787de457e68a804f923ded8513f5be9c72855b1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}