{
  "manageEntity": {
    "action": "Save",
    "entityId": "2139954063",
    "entityType": "Track",
    "nonce": "0x2c2159d267e7f8c1d30a806ba72f28774881dd86d9ac1a3bd0cf4b964358f30e",
    "signature": "0xd726d083dfbbf09e45e3d5defd5ad1a27c74919938fd9a7046e7bd205b7360831d1f60250eb5889700c0eee8da3325a443af6b062b42b18df5ae3eb964d236841c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}