{
  "manageEntity": {
    "action": "Save",
    "entityId": "942935",
    "entityType": "Track",
    "nonce": "0x04cb79a8710b5a690c95ce23eec49e01de95a42bff8fcf701833a13d4488ae07",
    "signature": "0xb404522be9ea7e5c3b508036b7577eab4e776d5b72b0743699304b46ff887c186ce698739d994f39a37117a398dcc652abba7a3ca64b819b47cdeb0f7cd5ea261b",
    "signer": "0xe7329D7eBdA1f581Da1FFF9Cf55eF76Cced6323a",
    "userId": "799024490"
  }
}