{
  "manageEntity": {
    "action": "Save",
    "entityId": "305038301",
    "entityType": "Track",
    "nonce": "0x7b25c5559fa4daa38b76a1f6db10bfd9d277e8adbabcb69ddf390ef2f3ae29c0",
    "signature": "0x46db90319b89123d6dad5069adce68cb983b63e1d7100f51e1869846e3241bbc43ba0301dc52f5d67f8d0673907fac9793f30a889046d85829cb27ba653150e21b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}