{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348136656",
    "entityType": "Track",
    "nonce": "0x504c06ffd655da828bd94fe875a28315f7bcadf0b99986cb7fcfe448f935adb4",
    "signature": "0x418dd0fdde36c3521f158e519dd0dd9636c03a3885d0eb53e7df229979eeeb375b441e3ff5bca3bf4f07b11cb07583d9adfbff908b0ef752de0039b182c4e2a81b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}