{
  "manageEntity": {
    "action": "Save",
    "entityId": "196989575",
    "entityType": "Track",
    "nonce": "0x4a1ff8cf40a74ec766c718a141fde189152563998265e710a0a9fc98d5cf2253",
    "signature": "0x24fb509a8f43d2fab31f7e7a06155e744d5e81e0c0eaff0702028febbc6fd33251e2029a5631c118e5d69ab10b5ae31a5a6cc3d38c51673c3879de239bf585461b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}