{
  "manageEntity": {
    "action": "Save",
    "entityId": "623085837",
    "entityType": "Track",
    "nonce": "0xa536d85a42aa127cf1dd6ef1bdf3518a686302f2bab2a845d53bd77fdd28a41e",
    "signature": "0x5a5fc1e5e40e10a3d5bf2a7bde05fb4bafcf846328d95d35da0919bcbababcbd2ca34c5ee3513eec2cca858b5ae2edb448de6fd1c92ee7f325e769df4ad1c47e1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}