{
  "manageEntity": {
    "action": "Save",
    "entityId": "181750842",
    "entityType": "Track",
    "nonce": "0xe85298ec8ea310408e878b2f742070c2d8bca603ba2c216e906f17fe3664b510",
    "signature": "0xa4bca2b8107fb95bb774bd87859d7d6228f25c45ee57307c70fc325b64e553ed1727a72c9c74648ab86c87b2d602d29fa3608e882050927063ce433fbff0d89f1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}