{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114346652",
    "entityType": "Track",
    "nonce": "0x1974e7220fadb00b8c555b7a12a118d704a230acf7ba0f213c23a88a0c1aa83b",
    "signature": "0x4d6640b9d50906d72d35982c3bdd52b6adfdcb0d773aca325d805ac4c0b89fa86ef66b1cbdf9aa4bc9939a7465cf87fe22fdcb5ddf9ea3f9ac519ec35c6511a01c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}