{
  "manageEntity": {
    "action": "Save",
    "entityId": "1522293564",
    "entityType": "Track",
    "nonce": "0xb7bb5fc57b3758d99283c5622e9da9b0b0499b966f671cffa7f47bcbaa867fce",
    "signature": "0x07cd6349d3ac77de5889e2d7fc573847de13af8b191b9a6577290def7b224c572cb88a7d67eae20aea2e6903de5d1e384917c563661fd9eb50c9940f88e4c5371c",
    "signer": "0x261c17dd7171Ea18B7ffF1AbB7D0495fEa0dB0ad",
    "userId": "185086709"
  }
}