{
  "manageEntity": {
    "action": "Save",
    "entityId": "206193724",
    "entityType": "Track",
    "nonce": "0xb1dcbbd2f6110e26ef3e1219de84417c8d3075ac6053c8c3b6f5b2a01ea104a9",
    "signature": "0x9ffaad03062c4b0b5e798a46ff0d02fd5290efe36a38b890e7d5f8a4cbc1748720486d44b1de8ee03c33efb997be19061e2a977387f47841d65e7709f551da1d1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}