{
  "manageEntity": {
    "action": "Save",
    "entityId": "2139329753",
    "entityType": "Track",
    "nonce": "0x32a86f23e52abbf2851784c35023c9d69c9524fbdff9d5fc3913cfe69c18096a",
    "signature": "0xa9064d249132958f761e57bfda27990e186bb5144384030875ce71abeab79bc266b5e3f6e8b40391b63217db30cf584b83e2cf05b574b5aa04003a40920ebb901c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}