{
  "manageEntity": {
    "action": "Save",
    "entityId": "1386391083",
    "entityType": "Track",
    "nonce": "0xd52797baeebbf46ac2942de732bc9787fc9af57c54ad214a576208bb37d786b2",
    "signature": "0xc7838a3ca4d9ab6876a48aaa1c7e7d3d847889ee2b0c22bce488775bf793bc4d63f5bd4c8e1364113be40d6de4424a8106e6ddfa4d47ed15bf190c05822645e51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}