{
  "manageEntity": {
    "action": "Save",
    "entityId": "446474159",
    "entityType": "Track",
    "nonce": "0xfa2d459d638218adbf6d528d8416d11ed5a247329762ad57b28619fea2494183",
    "signature": "0x5b0eabc9bfca6dbb56f9e49a347072df6c92b6eb66b8745fc275bc75070a1bc15409008ba4215f9de61b038df6411225513e4426f47b051c5303e6db99bebd201c",
    "signer": "0x7ceA71B4A8C4013A4f57c1A57eC0430915572e86",
    "userId": "31724295"
  }
}