{
  "manageEntity": {
    "action": "Save",
    "entityId": "1678445171",
    "entityType": "Track",
    "nonce": "0x176fecb89f9d2fd5d869dd22806c1bc54ce8b9f3e194cc5ca8c5f3b53d079e41",
    "signature": "0x812a9a904a2412c124e4b3aaa9df219be03e18a120c699ab300dad6bd1cf09e93cc5cec27c56f8c6fcf6e2d97f9d86d7bb6dc7131d80f29ac04f167494b1d59c1c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}