{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906351174",
    "entityType": "Track",
    "nonce": "0xca69df42edf92f44afe24044bf05551cf82ba7bc88feb9166500e8863460f744",
    "signature": "0xf4ecd6317ce198f2f2cb80b14f15d2c55c52b920e5b2580a6e83770f668557117e3eb9de6e82b2bbef92d24c87643a75d50bb6e2ef3afa51f4ac3b9830c300a21c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}