{
  "manageEntity": {
    "action": "Save",
    "entityId": "942676045",
    "entityType": "Track",
    "nonce": "0xc5bd6117bc7c54c2cba7f05cff2e6ea87aef9dbb149aa61db4876a2845ebba5d",
    "signature": "0xc898a44f273abc1f1cf8f6dc63fb460b8146fe8a929e4ab9fe586c371fd5b80e5ad108d2630393699f13d4639075ca7e5219bbd3a9f55696ebfd86bc0e5105771c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}