{
  "manageEntity": {
    "action": "Save",
    "entityId": "194193",
    "entityType": "Track",
    "nonce": "0x631494161a27b9b0579fd783c1c14f5f56e135215ecc9d70bc7c5df472f06611",
    "signature": "0x2b5ee6fdb31c2201f9986ea7f045a9815b7f0cfec913818a44d8d32f0148384928a0f3ca2bafb35d323151cb9f79e3d7cd835ced25c702b6ab8eb602b36a29551c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}