{
  "manageEntity": {
    "action": "Save",
    "entityId": "2140943140",
    "entityType": "Track",
    "nonce": "0x834d549a0b12e64ae9283668fa7754410ba8f29a7cd31bd8f3a4c05b9faca131",
    "signature": "0x1171f3ba15043ea474c8c2a4a2bb2a00c8ee0eaae8a734bd191bf95fb9f464df74b034e1f03b1e506b72d512916e724967f7db7dc1a0910553700d2cd7d0ad221b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}