{
  "manageEntity": {
    "action": "Save",
    "entityId": "493666173",
    "entityType": "Track",
    "nonce": "0xe8f464f414f81ab33479621e368969acf11f05986b479ab29d122913d24b62a2",
    "signature": "0xefc174432f721c6b2ecf46940d0c3f8d75855412e347fd14ffc1ba5ffd32b20c550dfbdedbd7f8796e06c9d6b01b15dd304093bdd5d58721e3963d23edc9060b1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}