{
  "manageEntity": {
    "action": "Save",
    "entityId": "1574792994",
    "entityType": "Track",
    "nonce": "0x08c325d61228445d98cb67b10b2cdcc5e92c8e1f271cc74bf7cec13278573deb",
    "signature": "0x1aec2d2151b55d1a4b1e9fbcb5b737f2a60657cf79c346e0b750b359e85477240cec8a953d6707e403d3f44daeb57c9aa9187846837f4eadef95f93be8e506791b",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}