{
  "manageEntity": {
    "action": "Save",
    "entityId": "1417683837",
    "entityType": "Track",
    "nonce": "0xd09d409eafcc623fc2558a38d4564fb7f53663522a6e4405d961e7422a524d31",
    "signature": "0xe7f224da17f2e4fb35876ffd4890146fb7f36c2fd03313240796022ed75632e855d57e6d0dd931e0082a0e699d2847f13c74d6536b89346aa1f206c8918836f21b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}