{
  "manageEntity": {
    "action": "Save",
    "entityId": "1162581723",
    "entityType": "Track",
    "nonce": "0x1213709a14cb366f07c28165ba8a709353d7e803dbb8c9f49bdfa659826e80a5",
    "signature": "0x8d28aeee6ae55ec8fb38007ebacf90bba5686d07783a43ebc1a2455c289ef9035ff7e02f063742e42379cd46737b137dfcc813941fc79d07b211ecc8d454f4d71c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}