{
  "manageEntity": {
    "action": "Save",
    "entityId": "1205429998",
    "entityType": "Track",
    "nonce": "0x3b9d664d3a43c1f6a6e03a47f57cdf88ecb87b8039c9b92713b661b200985683",
    "signature": "0xe5c12d363fc2eb4ddfe158b7dc68593e899a31c2540be962ba008a8877f68a6936ae1a898c26900d33d0747763ee27cbc038eb033865def6cd00c78541ef42c11c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}