{
  "manageEntity": {
    "action": "Save",
    "entityId": "1528069878",
    "entityType": "Track",
    "nonce": "0x6853e6968a984e978ab716b80842c9a5e217cc072262e0b6e7019db3619e07da",
    "signature": "0x37a426f0a9377e804518fb95d920b54d6623a866316d05aa02789d5a92910d1651388d23e9be7dfb64ccb395c33522e9bef52398e393d61e3f24c688bbaeb5e31c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}