{
  "manageEntity": {
    "action": "Save",
    "entityId": "486953645",
    "entityType": "Track",
    "nonce": "0x20ba94f2e11bae2115992b7c075f0e07f53c96a80f1323ca71c2d7070a596040",
    "signature": "0x5d70031494c9c67a5d95e35bd931cfa217a8c990f0ef9ca0e93e8f15b17b4ef46fef8bdabc41b3ea06c618c9b08682ec22e61f27cbc8c465b0afea814fe495a11b",
    "signer": "0x7Cd44Dc53B13eEA7335A000Ce36c05cDFE34b348",
    "userId": "355113"
  }
}