{
  "manageEntity": {
    "action": "Save",
    "entityId": "213246",
    "entityType": "Track",
    "nonce": "0x66a69e9eea2ae08f96cc8ef6c0efa0367e051c116a9423f20ae37cd09516a076",
    "signature": "0xb37f1de89535901d2e47fe0a7d3983f01982b5428b6404feaf8bd8d734c017e55e7385764fb98f18077b11ebc91482626f58862d888d16b0cfbf50840b585c311b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}