{
  "manageEntity": {
    "action": "Save",
    "entityId": "1203477119",
    "entityType": "Track",
    "nonce": "0x8c532e307926b1fe46aae25c25a0e0be429a84971a00eb8cfd48c068e3799359",
    "signature": "0x5656c9a589342a208220e018ca6749db39ca754af67a8cc2865d889f0afcd0be02be55b81da50662d12077af05dbd33845b040c612d507c692c5f53d42d5fa871c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}