{
  "manageEntity": {
    "action": "Save",
    "entityId": "1104661",
    "entityType": "Track",
    "nonce": "0xd8e95de3272907d086b5ec3e5a74ddf9183cc219c5fbd865491fe976227f2a4e",
    "signature": "0xc20f333a5d782907dcd124074f61cef385b21cb12f542e2252129839fa09793517af6b33fba93691ea25ec2dc3456f97ee4a6f3724006fe259fbb04de0eb945b1c",
    "signer": "0x0246262E4959323EAC2FBf603C6D24352d57Fc51",
    "userId": "700531000"
  }
}