{
  "manageEntity": {
    "action": "Save",
    "entityId": "1486869178",
    "entityType": "Track",
    "nonce": "0x0353e34a2e5d1f412fa1273909d9174d3134a20401bfe1b8bf24980a1097a7f3",
    "signature": "0x4f94ddcddea99f435c35c88ea9d4aaa1d5c14c6e3d0159b05ad1a9ad2ac060e23407bb0d281ee5dc39c84fa20407b31b3b5237eaeda786f2cdccbcb3d8857cc71c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}