{
  "manageEntity": {
    "action": "Save",
    "entityId": "1687187552",
    "entityType": "Track",
    "nonce": "0x2e7d16f29c7aa17494233305865f019e0af1af60db6cb8210b76d0ad9eeb328e",
    "signature": "0x6302a2bf6bdb345ad071c5938eea1eec46216a65db5c7fff1a3243e45b80ec811062d8a9fa102316b15a383ce323853dcbf2e63d62ff5026d9104b877dedb3271c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}