{
  "manageEntity": {
    "action": "Save",
    "entityId": "1445159197",
    "entityType": "Track",
    "nonce": "0x2d50eae233155c6d0d56ce282390df87b76f62bf545370dd28a3220de1e2cc82",
    "signature": "0x81ba579b9a1c231cc0c5bb237a3ff325872f0ec86f5cb76340ce9c31daf552ee667fa6897b5d8f935eedb19a0588d3d03857cfa901d6e86c525c267c2bbb9a5a1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}