{
  "manageEntity": {
    "action": "Save",
    "entityId": "1629936682",
    "entityType": "Track",
    "nonce": "0xd53f002ee529c18eaed7a2307c1205dee5e9f1a2a89c044f00a528184e88f5f3",
    "signature": "0x72ef7404292d26c1d2d6fb2fb8822ef06afce0578f81bb9e5cc240e61d91c6aa77920d4bb4a49b7641c774702267c5974497dfb770dbcc4150a623f143436b911b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}