{
  "manageEntity": {
    "action": "Save",
    "entityId": "1099674232",
    "entityType": "Track",
    "nonce": "0xbbe9faaf04c869c08b78c52abc460607cb48027e010c1e7dfcb6cf3796c4ff16",
    "signature": "0xd165cd29e78050e49921c5e4562f41087546dc933cc961800a401086adf4acc12fe1da4813a54a3f3a76e538d9e935ec93d3857859aaa70101d0ef84f3088fc41b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}