{
  "manageEntity": {
    "action": "Save",
    "entityId": "172031503",
    "entityType": "Track",
    "nonce": "0xa1c6eee245fe51f9c142f14c8cdf9e23a1a28b9afc27393a089e69228f083f4d",
    "signature": "0xeb4d879f05045c3a5b143c48347623eec96960ccead516fa4d54cc283d33b30e63f20edd7b13136d4c512a5936dd58237114252ddb3483970f6752cd1ce323911b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}