{
  "manageEntity": {
    "action": "Save",
    "entityId": "1908140569",
    "entityType": "Track",
    "nonce": "0x0a116e1e6d5334e30e7816fcb36e46e0d49707bf72a3cf2bce76e25d12381be7",
    "signature": "0x5f2ea8cc29e18331cb9051c2219bcfc77acfbfe99d2facfb53fa4cc0f3ebc7372c118fff40157b9cbc85009829c5ce59582aa019f02d7da4d6955c9590a3eec21c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}