{
  "manageEntity": {
    "action": "Save",
    "entityId": "1812639335",
    "entityType": "Track",
    "nonce": "0xc06dd0c78c691a53be47482a3b68cd0dd8307a985010a64546388f03aad42461",
    "signature": "0x08cbe1ece1723b68c5ca79032ebc51305eb6524c1e88f69d5b5784c9f1ad92b97cc296ce3ac0daa6e76716dc5607ad351ad15efab64d79723a52aeeccea000411b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}