{
  "manageEntity": {
    "action": "Save",
    "entityId": "910472446",
    "entityType": "Track",
    "nonce": "0xbd456a44f7c58e26f7a11aa4171bfd2b0df1c5fbc05da6484d926572049b8e95",
    "signature": "0x2e0bac91ee5e1e80b057e7f0cab68ebb222315202879dad0e59e8d4b31603d0221eb6e2391d0e3d2aa2dec284a61c1748874f34a13efb432be00f5a390840d711b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}