{
  "manageEntity": {
    "action": "Save",
    "entityId": "674630798",
    "entityType": "Track",
    "nonce": "0x6cef1b941d27450505f0d2252b93d8a33c6a5e8810e3077479c5425a77cc147d",
    "signature": "0x0cf81ef63d9645474dc4b88753aec8d73d9bb460d0c3344a03fe0465a00cb1d91d762bdc356f3cabfbb9c73cb5df61f8db4468d77b9c58a15d54267c89524ea71c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}