{
  "manageEntity": {
    "action": "Save",
    "entityId": "655136",
    "entityType": "Track",
    "nonce": "0xa95910991b91b44d02bbcde8ff43ec37db651c134f3561ca4b226b42e3dce029",
    "signature": "0x0851c1779ee67f8a090ea4cb3b014f4fc13faf4832718ddbf64f4800792bdebd094a718de1235f0bdc694da6b3ac41bf5b06c689ae14f61ea5d45f88fab631d81c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}