{
  "manageEntity": {
    "action": "Save",
    "entityId": "43285",
    "entityType": "Track",
    "nonce": "0x87d4924f4da0e44efe820baed0057de5130ba804146076e0cdc5119367e5fe7f",
    "signature": "0xafa45a1371a5ea5683c2880a7f49defe6ad60ce6d3d71db7b04dd8f0f10a80fb799aa6f05049ed694c93bac40eb4e944afc757b26586eb641b1f8cc54c4022c11c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}