{
  "manageEntity": {
    "action": "Save",
    "entityId": "214776",
    "entityType": "Track",
    "nonce": "0x20ed3f822fd817597a4c206b7d765334ab5f77c3ea0c73700dd51012f43b1e9e",
    "signature": "0xf101815a1c4f5de054d6581baee8dcadd823d2f77722c863b2ae7696f8e09e0f0976fbb5ee6d42af89e69fcb360dc6093448c2837ce3a355d5ba9c73308133ab1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}