{
  "manageEntity": {
    "action": "Save",
    "entityId": "754799236",
    "entityType": "Track",
    "nonce": "0x186c67a2a1435b76d772b9f2703b6d491f08c855cdd8ee98eb024a3fd7e9fc33",
    "signature": "0x787415afc9cd599e082ded54982f1b18137439e495569c1e5cf857897eb7d3182eac4be7d6ccdf44694c259fdf4ae09a6df6415db16af62207990284aa4d2f8c1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}