{
  "manageEntity": {
    "action": "Save",
    "entityId": "1532803722",
    "entityType": "Track",
    "nonce": "0xa6885c4430cfe27efd98062fceb2259f7faa16b212d60a3a4faf75a2ae11fc73",
    "signature": "0xa711e988310065b958344d16c7f46e09ae892f57f79d078949e9c5f8e6a7de8503d0956e12ae30402e60e5c353dd6a4daaff81da7a08bf83dcf76ec33a1dc6e61c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}