{
  "manageEntity": {
    "action": "Save",
    "entityId": "762359560",
    "entityType": "Track",
    "nonce": "0x171fc9884bec900f2e4f3f2323695d07f16115a42f418e82bd83a5992ed29069",
    "signature": "0x87b9750fb728bcbb613ec503f53a566b6e28d4dc58b09d3da3b10bb13125a34001c88b201bfcceee05c4ccecadfaa17d651ab88a594ac1cc5b9a8b29f929a8e01c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}